�?�?t ρ l k + �?�?x i ρ l k v l = �?�?x j μ + μ t σ k �?k �?x j + G k �?ρ l ε �?Y MThe lessen in annular return movement will cause the stream speed of drilling fluid during the annulus to minimize, and also the friction concerning it and the annulus will lessen, so the BHP and standpipe force will decrease linearly with

�?Nonetheless, if the force stabilization time is six min, the fitting degree is the bottom and also the evaluation results of the drilling fluid lost control performance is “average.�?In a certain assortment, the coincidence degree of your indoor and industry drilling fluid lost control effectiveness is negatively correlated With all the st